摘要
以硝酸镧、硝酸钴、钼酸铵等为基本原料,采用水热法合成出复合催化剂前驱体。前驱体经高温煅烧得到掺镧钴钼复合催化剂粉体。然后通过TG-DSC、FTIR、XRD、SEM等检测手段对前驱体及产物的物性和结构进行表征,揭示其内在的物理化学特性。结果表明:在本实验条件下,合成出的前驱体具有一定的抗烧结能力,镧元素已掺入到钴钼复合氧化物的晶格之中,形成了掺镧钴钼复合催化剂粉体。粉体颗粒表面孔洞丰富,有较大的比表面积,符合催化剂的物性要求。
The composite catalyst was prepared La2 O3, Co（NO3 ）2· 6H2 O and （ NH4 ）6 Mo7 O24· 4H2O as raw waterial and calcined at prodromal form under the high temperature. The precursor and the calcined catalyst were characterized by TGDSC, FT IR, XRD and SEM. The results showed under the experiment conditions, the precursor was stable and, La was doped into the crystal lattice of Co-Mo composite oxides. The specific surface area of the catalyst was increased and met the requirement of the catalyst.
出处
《化学世界》
CAS
CSCD
北大核心
2007年第12期724-727,共4页
Chemical World
基金
江苏省高校自然科学基础研究项目(06KJD150200)
关键词
复合催化剂
镧
水热法
高温煅烧
composite catalyst
La
hydrothermal method
high temperature calcination
